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<li class="navelem"><a class="el" href="dir_5956a3e80a20e8e03eb577bedb92689f.html">gpu</a></li><li class="navelem"><a class="el" href="dir_5865795754b604b902e524ed1add5694.html">utils</a></li>  </ul>
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<div class="title">Comparators.cuh</div>  </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) Facebook, Inc. and its affiliates.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * This source code is licensed under the MIT license found in the</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * LICENSE file in the root directory of this source tree.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;</div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;</div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="preprocessor">#pragma once</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="preprocessor">#include &lt;cuda.h&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="preprocessor">#include &quot;Float16.cuh&quot;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;</div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="keyword">namespace </span>faiss { <span class="keyword">namespace </span>gpu {</div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;</div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00017"></a><span class="lineno"><a class="line" href="structfaiss_1_1gpu_1_1Comparator.html">   17</a></span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Comparator.html">Comparator</a> {</div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;  __device__ <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> lt(T a, T b) {</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;    <span class="keywordflow">return</span> a &lt; b;</div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;  }</div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;</div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;  __device__ <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> gt(T a, T b) {</div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;    <span class="keywordflow">return</span> a &gt; b;</div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;  }</div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;};</div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="preprocessor">#ifdef FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="keyword">template</span> &lt;&gt;</div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="keyword">struct </span><a class="code" href="structfaiss_1_1gpu_1_1Comparator.html">Comparator</a>&lt;half&gt; {</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;  __device__ <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> lt(half a, half b) {</div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="preprocessor">#if FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> __hlt(a, b);</div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> __half2float(a) &lt; __half2float(b);</div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="preprocessor">#endif // FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="preprocessor"></span>  }</div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;  __device__ <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> gt(half a, half b) {</div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="preprocessor">#if FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> __hgt(a, b);</div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="preprocessor">#else</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="preprocessor"></span>    <span class="keywordflow">return</span> __half2float(a) &gt; __half2float(b);</div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="preprocessor">#endif // FAISS_USE_FULL_FLOAT16</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="preprocessor"></span>  }</div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;};</div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="preprocessor">#endif // FAISS_USE_FLOAT16</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;} } <span class="comment">// namespace</span></div>
<div class="ttc" id="structfaiss_1_1gpu_1_1Comparator_html"><div class="ttname"><a href="structfaiss_1_1gpu_1_1Comparator.html">faiss::gpu::Comparator</a></div><div class="ttdef"><b>Definition:</b> <a href="Comparators_8cuh_source.html#l00017">Comparators.cuh:17</a></div></div>
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